eio_write

(PECL eio >= 0.0.1dev)

eio_write — Write to file

說(shuō)明

eio_write(
    mixed $fd,
    string $str,
    int $length = 0,
    int $offset = 0,
    int $pri = EIO_PRI_DEFAULT,
    callable $callback = NULL,
    mixed $data = NULL
): resource

eio_write() writes up to length bytes from str at offset offset from the beginning of the file.

參數(shù)

fd

Stream, Socket resource, or numeric file descriptor, e.g. returned by eio_open()

str

Source string

length

Maximum number of bytes to write.

offset

Offset from the beginning of file.

pri

請(qǐng)求的優(yōu)先級(jí)：EIO_PRI_DEFAULT，EIO_PRI_MIN，EIO_PRI_MAX 或 null。如果是 null，pri 將設(shè)為 EIO_PRI_DEFAULT。

callback

callback 函數(shù)在請(qǐng)求完成時(shí)被調(diào)用。其應(yīng)匹配一下原型：

void callback(mixed $data, int $result[, resource $req]);
data

傳遞給請(qǐng)求的用戶數(shù)據(jù)。

result

針對(duì)請(qǐng)求的結(jié)果的值。通常是相應(yīng)的系統(tǒng)調(diào)用返回的值。

req

可選的請(qǐng)求資源，可被 eio_get_last_error() 之類的函數(shù)使用。

data

Arbitrary variable passed to callback.

返回值

eio_write() returns request resource on success, 或者在失敗時(shí)返回 false.

參見(jiàn)